---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/95301#article
headline: "95301: Transcription language code does not match the Conversation Intelligence (classic) Service"
url: https://www.twilio.com/docs/api/errors/95301
inLanguage: en
dateModified: 2026-04-23T17:38:05.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 95301: Transcription language code does not match the Conversation Intelligence (classic) Service

Log Type: APPLICATION

Log Level: ERROR

## Description

This error occurs when the `languageCode` on your Transcription request does not match the language configured on the Intelligence Service referenced by `intelligenceService`. Each Intelligence Service supports one transcription language only, and Twilio uses `en-US` by default if you do not set a language when you create the Service.

### Possible causes

* The Transcription request includes a `languageCode` that is different from the language configured on the referenced Intelligence Service.
* The referenced Intelligence Service was created without an explicit `languageCode`, so the Service language defaulted to `en-US` while your Transcription request uses a different language.
* You are trying to use one Intelligence Service for calls in multiple languages. An Intelligence Service supports only one `LanguageCode`, and you cannot update that value after the Service is created.

### Possible solutions

* Update the Transcription request so `languageCode` matches the language configured on the Intelligence Service you pass in `intelligenceService`.
* If you need a different transcription language, create a new Intelligence Service with the required `languageCode` and use that Service SID or unique name in `intelligenceService`.
* Create a separate Intelligence Service for each language you need to transcribe.

#### Additional resources

* [Calls Transcriptions subresource](/docs/voice/api/realtime-transcription-resource)
* [TwiML `<Transcription>`](/docs/voice/twiml/transcription)
* [Intelligence Service Resource](/docs/conversation-intelligence-classic/api/service-resource)